package com.zxy.demo.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

public class HelloClient {
  public void connect(String host, int port) throws Exception {
    EventLoopGroup workerGroup = new NioEventLoopGroup();

    try {
      Bootstrap b = new Bootstrap();
      b.group(workerGroup);
      b.channel(NioSocketChannel.class);
      b.option(ChannelOption.SO_KEEPALIVE, true);
      b.handler(new ChannelInitializer<SocketChannel>() {
        @Override
        public void initChannel(SocketChannel ch) throws Exception {
          ch.pipeline().addLast(new HelloClientIntHandler());
        }
      });

      // Start the client.
      ChannelFuture f = b.connect(host, port).sync();
      f.channel().closeFuture().sync();
    } finally {
      workerGroup.shutdownGracefully();
    }
  }

  public static void main(String[] args) throws Exception {
    HelloClient client = new HelloClient();
    client.connect("127.0.0.1", 8000);
  }
}
